function remove()
 {
     xtc_db_query("delete from " . HelperFunctions::escapeSql(TABLE_CONFIGURATION) . " where configuration_key LIKE 'MODULE_PAYMENT_SOFORT_SL%'");
     xtc_db_query("delete from " . HelperFunctions::escapeSql(TABLE_CONFIGURATION) . " where configuration_key LIKE 'MODULE_PAYMENT_SOFORT_SOFORTLASTSCHRIFT%'");
     //if this is the last removing of a multipay-paymentmethod --> we also remove all shared keys, that are used by all/most multipay-modules
     parent::remove();
 }